Sample of interactor that handles multiple Y axes zooming

Question

How to implement an interactor that handles multiple Y axes zooming?

Answer

If you have several Y-axes and you want the zoom interactor to zoom all axes equally, there are two ways of implementing this:

1. The default implementation of IlvChartZoomInteractor performs zoom on the Y-axis of the chart whose index has been specified to the IlvChartZoomInteractor constructor.

   Whenever there are several Y-axes, only the specified one will be zoomed.

   You can subclass IlvChartZoomInteractor and implement this functionality yourself to perform a zoom on every Y-axis.

   Here is a sample composed of a subclass of IlvChartZoomInteractor and a small chart example to show the behavior of the custom zoom interactor:

   • the small demo program source code
   • the chart interactor source code

2. You can install an AxisListener on the first Y-axis that will adjust

   the remaining Y-axes whenever the visible range of the first Y-axis changes.